1. Chemical composition

C Si Mn P S Cu
0.42-0.50 0.17-0.37 0.50-0.80 ≤0.035 ≤0.035 ≤0.25
Cr Mo Ni V W Co
≤0.25 - ≤0.30 - - -

 

2. Equivalent Steel Grade

DIN ASTM GB EN / ISO JIS BS

1.0503

1.1191

 1045 45  C45E4

S45C

CK45

EN8

080M46

 

3. Mechanical Properties

Tensile

Strength

(MPA)

Yield Strength

(MPA)

Elongation

(%)

Reduction

(%)

Impact

(Aku/J)

 Condition
min. 600 min. 355 min. 16  min. 40

min. 39

Normalized

Hardness annealed ≤197HB, Cold drawn ≤229HB.

 

4. Charateristics

C45 is a medium carbon steel grade offering reasonable tensile strength. Supplied in the cold drawn or hot rolled condition, tensile properties can vary but are approximately between 500-800 N/mm². This grade can be flame or induction hardened to produce a good surface hardness with moderate wear resistance. C45 is widely used for components that require better properties than mild steel but does not justify the costs of an alloy steel.

 

5. Applications

C45 is widely used for many general engineering applications. Typical applications include tools, shafts, nuts, bolts, connecting rods, screws, rollers.

 

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